IL‐17A production by CCR6+ ILC3 is required for Klebsiella pneumoniae clearance and contributes to protection against systemic Candida albicans infection.53, 123 ILC3‐derived IL‐17A has further been associated with pathogenesis of obesity‐associated airway inflammation and psoriasis in mice and humans.124, 125, 126 Although relatively less characterized, ILC3 also secrete IL‐17F and a role for this cytokine in skin inflammation has also been suggested.127. This evidence concerns the gene IL17A and psoriasis.